Concrete-wall boxing



Dec. 25, w23. 31,478,653

A. E. HOLMES CONCRETE WALL BOXING Filed March 30; 1923 Patented Dec. 25, i923.

eine sara ARTHUR EDWARD HOLMES, OF TIIVIARU, NEW ZEALAND.

CONCRETE-WALL BOXING.

To all w hom t may concern:

Be it known that l, ARTHUR EDWARD HOLMES, subject of the King of Great Britain, residing at Vai-iti Road, Timaru, Dominionof New Zealand, have invented new and useful Improvements in or Relating to Concrete-vVall Boxing, of which thev following is a specification.

This invention relates to the boxing used in the erection of the concrete wallsof buildings of all kinds, when such walls are erected by being moulded, in situ, course by course, to the height required.

The boxing designed and forming the subject of the invention is adapted for use in the formationy of solid walls or cavity walls, as may be desired, and is constructed to form the mould on the two sides of such wall.

The invention covers a special arrangement of planks or sheets to form each side of the mould by the arrangement and connection of which two planks or sheets are connected together by such means as to be adapted to be disposed, edge on, one vertically above the other, and to be transposed in position one upon the'other, in continuous sequence as each course of the wall is moulded, so as to form the mould for the next course. It also covers a special oo nstruction of means whereby the mould members on the one side of the wall may be stayed by cross ties with those on the other side in order thus to prevent the mould from spreading.

The invention is illustrated in the accompanying drawings, in which Figure 1 is an end elevation of the boxing forming one side of the mould.

Figure 2 is an outside elevation of one end thereof. Y

Figure 3 is a plan of one of the stay bars used in the assembly of the boxing.

Figure 4; is an end elevation of the boxing as assembled for use in the construction or" a wall.

Figures 5 and 6 are detail views that will be hereinafter fullydescribed.

In Acarrying `out the invention the wall mould is formed of similar construction on eac-h side and is made fof @Ilyapproved length so that by the end to eind arrangement 0f vSections Similarly madeeny de- Siredi` .length4 Qt. Wall maybe 'cnstru'ctd' in Y'theV well known systems;

Application filed March 30, 1923. Serial No. 628,861.

l In this invention each mould section, for each side of the mould, is made up of two wooden planks, or metal sheets, A-A of approved and equal length and width.

vrlhese two planks are arranged edge on one above the other, and to the outer surface of each, at each extremity, a length B of angle iron is fastened so that it extends vertically up the plank and has one web projecting out at right angles from the planks surface. rlhe angle irons on one plank are disposed to extend uniformly with those on the other, and if required, as where the planks are long, similar bars may be disposed at other points in the lengths of the planks.

Combined with each pair of angle iron bars thus provided is a metal linking bar C that fits against their outwardly projecting webs and is arranged tooverlap both bars to the middles of their lengths. This link is then attached at its ends to the respective angle irons by means of the pivot pins D that pass through the link ends and then through slots B formed to extend longitudinally for a distance in each angle iron. This allows for an amount of independent up and down movement of each plank in relation to the other, limited in extent by the length of these slots Vand for a purpose to be hereinafter described.

The linking of the two planks together by means of these pivotal links willthus permit of one being swung out from beneath the other in the manner shewn by the dotted lines in Figure l, and then raised and swung in to occupy a similar position on the top of the previously upper plank. The planks may thus be transposed in position and worked to higher elevations'by the repeated movement of the lower plank to the higher position.

For holding the two planks rigidly in the same plane, the link C is provided with a pin K projecting from its surface into the space between the two angle iron bars, and each bar is formed on its projecting web with a half round recess b in its top edge into which the said pin will drop when the one plank has been turned from the lower to theupper position. The provision' of the slots B allow for this engagement of the recess with the pin.

The web of each angle iron length that engagesthe surface of the plank is. farmed at its Aupper end with a tongue E projecting longitudinally upwards beyond the top edge of the plank and at its lower end with the tongue J projecting longitudinally downwards below the bottom edge of the plank. This latter tongue is however bent outwards from the plane of the web so that its bottom extremity extends in a plane outside of and parallel with the tongue E.

For use in conjunction with the mould members thus constructed, stay bars F (Figure 3) are provided. These are made of thin metal strips and of a'length corresponding with the thickness of the wall to be built. Each bar near each end is formed with two slots G and G disposed transversely across it andl at distances apart corresponding to the distance between the vertical planes of the tongues E and J of the angle iron B. The slots are also mande of sizes such as to be capable of receiving such tongues.

In use, as shewn in Figure 4.-, the mould members are disposed on opposite sides of a wall foundation course and are arranged so that they are supported upon the ends of a stay bar F moulded into such course so that its ends project. The bottom plank of each side then rests on such bar and is held from moving away from the foundation by the engagement of the tongue J in the outer slot G of the stay bar on that side. lThe top edges of the lower planks on both sides are then stayed together by means of a secondi and similar stay bar F interposed between the. planks (which may be done by reason of the provision by which the upper plank may be moved u wards from the lower) so that the slots GP at the ends thereof pass down over the tongues E on `the respective sides. The upper planks are then dropped so that the ton ues J will pass into the respective slots in the stay bar. A third stay bar F is then disposed in a similar manner across between the upper ends of the top planks. Consequently a mould is thus provided the sides of which are held rigidly upright and prevented from spreading or collapsing inwards.

Concrete material is then poured into the mould to about the level of the upper planks and when sufficiently set, the lower plank on each side is freed and raised to above the previously upper plank to form the mould for the next course, and so on repeatedly. This is effected by lirst freeing the tongue J of the lower plank from the slot in the bottom stay bar, by bending 'the end of the bar down in the manner indicated by the dotted lines. The planks support will thus be removed so that it will drop down and outwards to the limits allowed by the slots B, freeing also the upper tongue E from the second stay bar. The plank may thus be swung upwards on the links C to above the other plank and dropped into position thereon by causing its tongues J to drop into the slots G in the second stay bar and the pin K on each link bar to engage the recess in the angle iron beneath. The upper ends of the raised planks are then stayed by a further cross stay F, a further course moulded and thel whole operations repeated.

lVhen each plank is moved from the lower to the upper position, the stay bar F previously supporting it is drawn from the wall. l

When it is inconvenient to adopt the practice of bending down the stay bar ends to free the tongues J, such tongues may be made and secured to the angle iron bars in the manner shewn in Figures 5 and 6 in order that they may be moved vertically up and down independently of such bars. Y In this form each tongue is formed so that its upper end overlaps the surface of the angle iron web. It is then attached to such surface by means of the rivetsj passing through a slot J formed in the tongue and made to allow of suliicient movement to permit of the tongue being knocked up to free the stay bar and then moved down again to enabley it to engage the upper stay bar when the plank to which it is attached is lifted.

The stay bars may be used to support a cavity forming core of any approved construction, such core being lifted course b course in a well known way in correspon ence with the raisingv of the mould course by course. Y

I claim v n l. Boxing for the moulding of concrete walls formed, for each side of the mould, of two planks adapted to be disposed, edge on, vertically one above the other, each hav- `ing bars of angle iron secured to extend vertically on its outside face at lapproved points in its length and extending continuously with similarly positioned bars on the other plank, and a link bar made to overlap each pair of angle iron bars of the two planks7 and pivoted at its ends to the respective bars by means of pivot pins passing through the end and through slots formed longitudinally in the respective angle iron bars, and so disposed as to permit of one plank swinging in a transverse direction upon the-other, substantially as specified.

2. ln boxing for the moulding of concrete walls constructed as described in claim l, constructing each angle 4iron bar with a tongue projecting longitudinally upwards from its upper end, and with a. tongue projecting longitudinally downward from its lower end and bent to extend in a plane parallel with the bar and with the upwardly extending tongue, Substantially as and for the purposes specified.

3. Boxing for the moulding of concrete walls constructed as described in'the preceding claims combned with transversely extending stay bars adapted to extend beequivalent to the distance between the planes tween the upper and lower edges of the of the upper and lower` tongues on each ancorresponding planks on both sides of the gle iron bar, substantially as specified. 10 mould and formed neer each end with a In testimony whereof, I affix my signapair of slots, adapted to receive the tongues ture.

o n the said angle iron bars and disposed a distance apart in the length of the stay bar ARTHUR EDWARD HOLMES. 

